The following math puzzle has been shared more than 3 million times on Facebook. It seems to be easy for some people but difficult for others. Which group are you in?
Puzzle: 6 + 4 = 210 9 + 2 = 711 8 + 5 = 313 5 + 2 = 37 7 + 6 = 113 9 + 8 = 117 10 + 6 = 416 15 + 3 = 1218 ?? + ?? = 123
Answer: Split the resulting number “123” into 2 parts – 1 and 23. Those numbers will be 2 results. “1” will be result of “first number minus second number”. “23” will be result of “first number plus second number”. so, x – y = 1 x + y = 23 so, 2x = 24 x = 12 and y = 11. It was easy, wasn’t it ?
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